Introduction Resuscitative endovascular balloon occlusion of the aorta (REBOA) is rapidly evolving as an emergency haemorrhage control technique. It has wide potential applicability in remote and austere settings, and following military trauma where prolonged field care might be required. However, rapid confirmation of balloon delivery is a challenge which relies on estimates derived from anatomical measurements or trans-abdominal ultrasound. In addition, confirmation of adequate balloon expansion is difficult. Intravascular ultrasound (IVUS) offers a solution to these two issues, making REBOA a deliverable therapy in the pre-hospital and early hospital settings.

Methods In an animal model of severe ballistic trauma, following characterisation of the technique, an IVUS-REBOA device was configured, combining a peripheral angioplasty balloon and a digital coronary IVUS catheter. This was introduced via a sheath into the femoral vessel over a conventional angioplasty guide wire.

Results Real time IVUS imaging allowed confirmation of delivery of the balloon to the aorta, and also demonstrated full apposition once deployed. Furthermore, using ChromaFlo imaging, the device confirmed loss of pulsatile flow in the aorta after deployment, correlating with loss of transduced femoral pressure traces. Post-mortem examination confirmed correct anatomical balloon placement.

Summary For the first time, in a porcine pilot study, we have demonstrated that IVUS-REBOA is feasible and confirms both correct balloon placement and haemostasis. It has potential to offer advantages to REBOA operators especially during the pre-hospital and retrieval phases, and in the early phase of hospital delivered damage control resuscitation at remote locations.